Damper.



Patented Ian. 28, I902.

.1. w. ANDERSON. DAMPER;

(Application filed Feb. 2, 1900.)

2 Sheets-Sheet I.

(No Mo del.)

No. 69|,736. Patented Jan. 28, I902.

J. W. ANDERSON.

DAMPER.

(Application filled Feb. 2, 1900 (i'lo Model.) 2 Sheets-Sheet 2.

awe/Mow 3 with a damperconstructed in accordance with U ITED STATES PATENT OFi -"1c1515:.fif";-

mm; W. ANDERSON, or LANCASTER, PENNsYLvANiA.

DAM PER.)

, SPECIFICATION formingpart of Letters Patent No.r691,736, dated January 28, 1902. Application filed February 2, 1900. Serial No. 3,708. (No model) 7' To all whom it may concern:

, Be it known that I, J OH W. ANDERSON, a citizen of the United States, residing at Lancaster, in the county of Lancaster and State of Pennsylvania, have invented certain new and useful Improvements in Dampers;fand I doherebydeclare the following to be a full,

t clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains to make and use thes'ame.

This invention relates to improvements in dampers for stovepipes.

; 'lhemain objects of my present invention are toproduce a section of stovepipe containing'aidamper of simple and practicable constrnction that is thoroughly adapted to all fines and which may be conveniently and ef-,

- fectually operated to control the drafts theretion'of my invention will hereinafter-appear;

and the invention consists in certain features of construction and combinations of parts more particularly described, and pointed out in the appended claims'.

Referring to the drawings, Figure l is an elevation, and 'Fig. 2 a vertical longitudinal sectional view,'ofastovepipe-sectionprovided my prese'iit improvements, the device being illustrated as closed. Fig. dis a top plan view of the section thus provided, the damper being shown closed with its register open, Fig; 4 tea view similar to Fig. 1, viewing the section-from the opposite side. Figs. 5 and a (5 are details ot' parts hereinafter referred to.

Similarniihrerifls of referenceindicate similarparts in all the figures of the drawings.

As in my previous patents in this class of inventions, I prefer to assemble the parts composing the same 'ina short section of pipe 1, the latter being either formed of sheet metal or cast, as preferred, and designed to be joined to the adjacent ends of two Stovepipe v sections, all as usual, .If preferred, however, it will be obvious that my invention'may be constructed in or applied to anyordinary fine."

Above the point within the section -1 where the damper mechanism hereinafter described is located I may form thesaid section with a tween which at intervals I produce cold-air openings or-inlets 3. Seated between the ways or heads 2 and adapted to revolve over the openings 3, so as to open or close the it may be a slide-plate 4, the same being de signed for operation by hand or by automatic mechanism hereinafter referred'to. The ob- 0d the gases. 1

sides provided with bearingopenings 6 at points below the cold-air inlets referred to, and in the same are mounted for rotation the journals 6 and 7 of an annular damperframe or ring 8. 'The damper ring or frame 8 is formed with segmental draft=openings 9 and with a central -opening-10,the latterbeing occupied by a stem 11, axially disposed, ex-

oppositely threaded and held in position by means.v Near its opposite ends and arranged adj-nstably thereon are located baffle-plates 13.

orring Sis formed in the present instance with a cavity 14, in the bottom of which is located an internally-threaded stud 15. A hub 16 surrounds that portion of the journal lying outside the sect-ion 1, and is provided teeth of which engage with a toothed segmental plate 18, either secured to or formed as a part of the band 4. A thumb'screw 19 passes through an aperture in the hub 16 and enters the internally-threaded stud 15, thus confining the hub in position relative to the toothed segment 18 against the expanding rounds the said stud and is-interposed between the adjacent surfaces of the hub and the bottom of the cavity 14. Itwill be obvious that when the parts are thus arranged a partial rotation of the damper frame orring, so as to bring the same to a closed orhorizonof the damper will cause a reiatively partia.

ject, of course,-is to admit cold air above the" damper, thus breaking the draft or arresting the same-and preventing the consumption of fuel while at the same time serving to'carry The rear journal 7 of the damper-frame on its upper side with a toothed sector 17 the tendency of a coiled spring 20,,which sure pair of parallel annular ways or heads 2, be-

same,-ei -t-her wholly or partially, is a band, or-

'The section is at diametricallyopposite' tending at opposite sides of theframe or ring,

means of clampin -nuts 1-2 or other'suitable tal position, will cause anautomatic opening of the cold-air openings, or apar-tial closing;

.in area than are the openings.

opening of" said openings. It will be further observed that where it is undesirable to utilize the cold-air openings, as would be. the case with some lines, a loosening of the thumbscrew 19 would permit the expanding spring 20 to force the hub outward, thus disengaging its teeth from those of the plate 18, whereby the latter and the band 4. will remain undisturbed, and may therefore be either oper ated by hand or remain inactive.

Mounted rotatably upon the stem 11 at opposite sides of the valve frame or ring 8 are the three'leavedregister-valves 21, each leaf of which is slightly greater than onehalf the area of each of the openings 9, so that when the said registers are rotated in opposite directions the leaves thereof comblue to either partially or wholly close the openings 5). it is the ordinary practice in this class of dampers to use but a single register, the leaves of which are slightly greater This arrangementhas been objected to, inasmuch in many instances it caused too great restriction of the draft. By the present arrangement, however, I am enabled to greatly increase the size of the openings 9, and thus commensurately increase. the draft. I deem this to be one of the important features of my invention, irrespective of the means new to be described for operating the registers.

The jdurnal 6 of the damper frame or ring is hollow or tubular, projects through and beyond the bearing-opening 5 in'the pipe-section 1, and has formed at its rear end an annular head or flange 23 designates a lever for operating or rotat ing the damper ring or frame 8, and the same is removably mounted on the tubular journal 6 in any suitable manner. In the present instance the said lever 23 is provided at its inner end with a hub or ring 2%, provided in turn with diametricallyopposite internal lugs or ribs 25, which latter engage with corresponding grooves 26, formed exleriorly in the tubular journal 0. The outer or free end of the lever 23 may be provided with a knob for operating the same.

The hub or ring 2i is of somewhatless width than the tubular bearing 6, and there fore the latter projects slightly beyond the former, and it in the present-instance extends through a central opening 27, formed in a dial-plate 28, secured fixedly in the present =instance to the section 1 by means of rivets 29. lhis dial-plate may be divided in any convenient manner, the degrees being indicated in the present instance by numerals ranging from 0. to 12, and at the 'top may appear the word Medium, while at the bottom at opposite sides of the zero-point may appear the words Open hand Closed.

A rock-shaft 30, slightly longer than the tubular bearing (5, may be loosely jonrnalod in the said bearing, and therefore will extend beyond the opposite ends of the same. At its outer ei'id therc is mounted on shaft 30 an This indicator or hand is mainlaps the hub of the indicator and the point of which enters an aperture in the outer end of the shaft 80. V

At the inner end of the shaft 30 there is mounted a small pinion or spur gear 3%,.

which latter may be either formed integral with the shaft or secured thereto by any suitable means, and engaging the teeth of this gear at diametrically opposite sides are toothed segmental arms or rack-bars 35, one

of which extends from each of the register plates 21 and which are disposed in opposite directions. These segmental arms or rackbars may be maintained in operative engagement with the aforesaid gear by means of a guide or keeper 30, the same having a somewhat- U shape and being located on the shaft 30 between the flange 22 of the tubular jonr' nal 6, and the gear-wheel 34C.

It will be observed that, as before stated, the damper as a whole is rotated by means of the lever 23, and likewise will the cold-air openings be opened and closed by the same mechanism. The register, however, can be operated by means of the indicator 3l, which when moved over the dial rotates the rockshaft 30 and with it the gear-wheel 3%, thus causing the segmental rack-bars or arms 35 to travel in reverse directions and moving the ICO leaves of the opposing register plates toward or away from each other, thereby, opening or closing either partially or wholly the openings 0 of the damper.

It is well-known that no two tlues are ex- .actl Y alike some re uirim a real; deal of S .l. b 6

1. The combination with a da mper frame or ring, provided with radial register-openings; of registers axially swiveled in different planes at opposite sides of the said frame or ring, and provided with radiating leaves each of which is of an area equal to about one-half of each of said ie'g ster-openings.

2. The combination with a damper-frame or ring,- pr'lvidcd with radial register-openings; ot' registers axially swiveled in dillerent planes at opposite sides of said frame or ring, and provided with radiating leaves each of which is of an area equal to about one-half of each of said register-openings; and means for movin; said registers in opposite directions.

The combination with a stovcpipo sectlon; and a damper frame or. ring journaled rotatably therein and provided with scgmczb by the journalof the damper-frame; a keeper tal radiating registenopenings; swiveled at -opposite' sides of the ring and in diiferent planes and registers having radiating segmental leaves for said openings and located at opposite sides of said frame or ring, the leaves of said registers being of less area than that of the said openings; and means for rotating the said damper fram'e'or ring and-rotating v {the registers in opposite directions;

4,;The combination with a stovepipe-section; and a damper frame or ring journaled frotatably therein and provided with radiat .ing registeropenings; of opposite registers cated inv'diiferent planes at opposite sides of the said frame or ring,,and provided with leaves for the openings of lessarea than the same and with oppositely-disposed rack-arms arranged-in difierent planes; a pinion gear-- ing-with the said arms located between the same and carried by the journal of the frame or ring; and means for rotating the same.

- and gearing with the said. arms and carried by the journal of the damper-frame; means for rotating the damper-frame as a whole; and

independent means for rotating said pinion.

6. The combination with a stovepipe-section; and a damper frame or ring journaled rotatably therein,- and provided with radiati'ng register-openings; of'registers locatedin different planes and rotatably mounted at op-v posite sides of thesaid damper frame-or ring and having radiating leaves of less area than that of the openings; oppositely=disposed rack bars or arms carriedby theregisters; a pinion arranged intermediate of and gearing at oppos-itesid'es with the same, and supported supported by said journal and loosely engaging the arms or bars; and meansfor operatingthe damper frameor ring; and means for rotating the said pinion;

7, The combination w1th; a Stovepipe-section; a damper frame or ringhavingradiating register-openings and a hollow journal located therein; and an operating-lever mounted on. the onter'end of said-hollow journal; of re isters arranged in different planes and rota-- tably'mounte'd at opposite sidesof and carried by the damper-frame, and provided with ra r diatingleavesof-less areathan the openingsin. said frame .or ring;- oppositely disposed rack-arms extending from said registers; a

shaft journaled in the hollow journal; a pinion at. the inner end'ofthe shaft arranged in termediate of and engaging the rack-bars; an

i betweenthe same and the said guid'e.

indicating-hand at the outer end of the shaft;

move. v

' 8. The combination with a stovepipe secand a dial over which said hand i s-adapted to 'tion; adamper frame or ring havingregisteropenings, and a hollow journal located there; in; the outer end of said "journal being externally grooved an operating-lever therefor, thesame being provided with; a hub'hav'ing ribs to interlock removablywithsaid grooves of the journal; a stationary dial fitted over the outer end of the journal and serving to retain the said operating-- lever thereon; a shaft loosely mounted in the journal anldextending beyond the ends thereof; an indicating-hand' on the outer end of the shaft adapt inner end of the shaft and adapted ;to move therewith; and a U-shaped guide carried by the shaft; of'registers pivotally mounted at opposite sides'of the damper ring, or frame, and provided with leaves of less diameter than the register-openings; and rack-arms extending in opposite directions from thesaid registers; engaged by the said pinion and pass- 9. .The combination with a pipe section provided with cold-air openings; and a slide for closing the same; of a rotatable damper at a point below the openings; a toothed segment loosely mounted on one of the axes of said damper and adapted torotate therewith; a rack-bar carried by the slide; a spring-for normally pressing the segment out of 'aline ment and engagement with the teeth of the rack-bar; and means for preserving such ongagement against the tension of .said spring.

10.' The combination with a pipe-section,

provided with cold-air openings; and a'slide for the same ;of a damper rota'tably mounted 'in-t-he section below the openings; means for operating the damper; a rackrbar carried by the slide; a toothed segment for engaging the same carried by one of, the journals of the.

too

damper; and a yielding connection between a said toothed segment andsaid damper where. y the former maybe-thrown into and out of engagement with the rack-bar. a

;11. The combination with a pipe-section having a series of cofld-ait'ppenings; and a slide for the same; of a damper jonrnaled in the section below the openings; means for ro- .tating the damper; means 'carried by the damper-journal for ,operatipg the slide; anda yielding'co'nn-ebti'on between said slide-operating means .iiud'sai' d damper whereby the former may be thrown into and out of oper ation. v. I In. testimony whereof I have signed my nameto this specification in the presence of two subscribing witnesses JOHN W. ANDERSON.

8 ed to .move'over the said dial; a. pinion on the 

